126
2.
To vent, open a draw-off point in the domestic sys-
tem.
3.
Undo the cap at connection
A
.
4.
Attach a hose to connection
A
and connect to a
drain.
5.
Turn quadrant
B
to the correct position.
Checking the outside temperature sensor
X3
Fig. 96
100
10
-20 -10 0 10 20 30
Temperature in °C
6
8
20
40
60
80
200
Resistance
in kΩ
Fig. 97
Sensor type: NTC 10 k
Ω
1.
Pull plug "X3" from the control unit.
2.
Test the resistance of the outside temperature sen-
sor across terminals "X3.1" and "X3.2" on the dis-
connected plug and compare it with the curve.
3.
Where actual values deviate severely from the
curve values, disconnect the wires at the sensor
and repeat the test on the sensor itself.
4.
Depending on the result, replace the lead or the
outside temperature sensor.
Troubleshooting
Repairs (gas condensing module)
(cont.)
5775 636 GB
Diagnosis
Summary of Contents for C3TB
Page 136: ...136 Troubleshooting Repairs gas condensing module cont 5775 636 GB Diagnosis ...
Page 143: ...143 Parts lists Heat cell assembly 5775 636 GB Components ...
Page 160: ...160 Parts not shown 0009 PCB IU100 B30 Parts lists Fuel cell assembly 5775 636 GB Components ...
Page 161: ...161 Parts lists Fuel cell assembly cont 5775 636 GB Components ...
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